Spinning process for high-strength and high-modulus ultrahigh molecular weight polyethylene fibre

Abstract

The invention relates to a spinning process for a high-strength and high-modulus ultrahigh molecular weight polyethylene fibre. The spinning process is a one-step swelling and dissolving continuous type spinning process. Compared with the prior art, the spinning process adopts the one-step swelling and dissolving continuous type spinning process and has good swelling effect; the concentration of a spinning solution is increased from the prior 5 to 8 percent to 10 to 15 percent; the production efficiency is improved by more than 30 percent; the quality of a product is greatly improved; the high-strength (more than 35 g / d) ultrahigh molecular weight polyethylene fibre is obtained; the spinning process solves the problem of quality fluctuation caused by intermittent type operation in the prior process, has the advantages of simple process, strong manoeuvrability, high production efficiency and the like, and realizes the continuity of the production process and the excellence of the product quality of the high-strength and high-modulus ultrahigh molecular weight polyethylene fibre.

Description

Technical field [0001] The invention relates to ultra-high molecular weight polyethylene fibers, in particular to a spinning process of high-strength, high-modulus ultra-high molecular weight polyethylene fibers. Background technique [0002] With the progress of mankind and the rapid development of science and technology in recent years, the demand for special fibers from all walks of life is increasing day by day. Following carbon fiber and aramid fiber, ultra-high molecular weight polyethylene fiber (UHMWPE) has attracted much attention for its excellent performance and broad application prospects, and has made considerable progress in recent years. Ultra-high molecular weight polyethylene fiber has high strength, high modulus and excellent impact resistance, wear resistance and weather resistance, so it is widely used in military engineering, aerospace engineering, infrastructure engineering, agricultural machinery, ship rope, entertainment, etc. In the field, its application...

AI Technical Summary

Problems solved by technology

[0003] Manufacturing ultra-high molecular weight polyethylene fibers is a complex technical work. The molecular weight of polyethylene used to manufacture ultra-high molecular weight polyethylene fibers can be as high as 2 million to 5 million or even higher. The macromolecular chains are in a highly entangled state, making processing difficult. It is very large, and it is more difficult to produce high-quality fiber filaments. There is no ready-made mature technology available in China

[0004] At present, high-strength and high-modulus ultra-high molecular weight polyethylene fibers are all short-segment fibers, and the lengths vary, so the production length cannot be guaranteed. The application of short-length fibers is limited to the manufacture of bulletproof products, etc. When manufacturing rope products and fabrics, there will be continuous production. Problems of poor performance and high waste

At the same time, the existing ultra-high molecular weight polyethylene fiber production process has problems such as long lines, intermittent operations in some processes, complex and difficult to control processes, high broken wire rate, low production efficiency, high energy consumption, and difficult to control product quality. The production and application of ultra-high molecular weight polyethylene fiber